I don't know if you've already done this, but there is a search function on this site; you can access all sorts of older threads. Just look for the button in the upper right of your screen. It will search through all the forums so you'll read about how prednisone is used for all sorts of illnesses and conditions, but there is a lot of discussion about long-term usage, side effects, and how to taper off of the medicine.
Hope you get answers to your questions.
Allergies and Asthma Forum Moderator